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Indian Navy 10+2 B.Tech Cadet Motion in a Plane — practice questions

Explore 5 free Motion in a Plane questions in Indian Navy 10+2 B.Tech Cadet Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Motion in a Plane questions and exercises with answers

Showing questions 1–5 of 5.

As per your syllabus, the boy should hold his umbrella at approximately which angle to the vertical?Read the answer and worked solution →As per your syllabus, eqn 3.42a, the horizontal RANGE R of a projectile (same launch + landing height) is which?Read the answer and worked solution →As per your syllabus, the time of flight for the same 28 m/s at 30° projectile is approximately which?Read the answer and worked solution →As per your syllabus, eqn 3.43, the magnitude of the CENTRIPETAL acceleration in UCM is which?Read the answer and worked solution →Order the steps of EM wave generation by an accelerating chargeRead the answer and worked solution →

Worked practice questions

As per your syllabus, the boy should hold his umbrella at approximately which angle to the vertical?

  1. 19° toward east
  2. 45° toward east
  3. 19° toward west
  4. 30° toward east
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Correct answer: A. 19° toward east

syllabus Ex 3.1: tan θ = 12/35 = 0.343 → θ = 19°. Wind blows east-to-west, so umbrella tilts towards the east.

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As per your syllabus, eqn 3.42a, the horizontal RANGE R of a projectile (same launch + landing height) is which?

  1. 2 v₀² sin θ₀ / g
  2. v₀² sin θ₀ / g
  3. v₀² sin 2θ₀ / g
  4. v₀² (sin θ₀ + cos θ₀) / g
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Correct answer: C. v₀² sin 2θ₀ / g

syllabus eqn 3.42a: R = v₀² sin 2θ₀ / g. Comes from R = v_x × T_f = v₀ cos θ × 2 v₀ sin θ / g.

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As per your syllabus, the time of flight for the same 28 m/s at 30° projectile is approximately which?

  1. 9.8 s
  2. 1.4 s
  3. 5.0 s
  4. 2.9 s
Show answer and solution

Correct answer: D. 2.9 s

syllabus Ex 3.8(b): T_f = 2 × 28 × sin 30° / 9.8 = 28/9.8 ≈ 2.9 s.

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